it's interesting in this discussion that the Zaurus doesn't feature as an alternative to the N800 - also pocketable, can operate as a tablet, but has the swivel display/keyboard thing.

the Fujitsu 8420/U1010 is, apart from the price, another alternative to the micro-laptop Kohjinshas.

let's say you won a lotof money on the lottery and could buy every one of these tablets and ultraportables - money no object - would you still do so? Perhaps, but chances are you'd try them out and only keep one or two... there's only so much time available to properly set up and enjoy three computers - desktop (or laptop with dock), laptop, tablet/PDA.. and probably a separate phone to act as 3G/Edge mobile internet gateway.

Hence there's a tendency for people to stick with what they've got instead of flit between devices all the time... and once you've got one working fairly well and learned all its quirks you get reluctant to start again with something new unless there's a compelling reason to change. I guess this is why I still use my Palm T3 for PIM and use my Zaurus as a mobile internet terminal and general linux computer (never even put any effort into using the Z as a PIM, never got sync working!).

sorry for long rambling post but I was kind of thinking aloud!